Originally Posted by jonwvara
...don't you already have at least one bike set up with a Duopar RD?
Yes, great memory. I currently have DuoPars on my tandem and on Sporty.
I also have one I'm rehabing that I traded cudak888 for back in June. I plan to run it on my '62 Continental which has 42 & 47 tooth chainrings. I built a 15-34 six speed Suntour Perfect freewheel for this, but a 38 tooth ring would be even better!